US8705614B2ExpiredUtilityA1

Motion estimation using camera tracking movements

60
Assignee: RAMAKRISHNAN LAKSHMANANPriority: Apr 4, 2005Filed: May 24, 2005Granted: Apr 22, 2014
Est. expiryApr 4, 2025(expired)· nominal 20-yr term from priority
Inventors:Lakshmanan Ramakrishnan
H04N 5/77H04N 5/9201H04N 19/61H04N 19/56H04N 19/527H04N 19/00593
60
PatentIndex Score
2
Cited by
19
References
20
Claims

Abstract

Presented herein are system(s) and method(s) for motion estimation using camera movements. In one embodiment, there is presented a video camera system for providing video data. The video camera system comprises a video camera, and a circuit. The video camera captures video data. The circuit records information that indicates tracking movements of the video camera.

Claims

exact text as granted — not AI-modified
The invention claimed is: 
     
       1. A method for encoding video data comprising:
 storing a reference picture in a memory; and 
 predicting at least one portion of a different picture from the reference picture based on information indicating video camera movement between capturing the different picture and the reference picture with a motion estimator, wherein the information indicating the video camera movement is provided by a device that causes the video camera movement, wherein the information provided by the device that causes the video camera movement comprises trajectory data of the video camera. 
 
     
     
       2. The method of  claim 1 , wherein the at least one portion of the different picture is comprised of a macroblock. 
     
     
       3. The method of  claim 1 , wherein the at least one portion of the different picture is not the center of the reference picture. 
     
     
       4. The method of  claim 1 , further comprising:
 accessing, with the motion estimator, the memory based on the information indicating video camera movement between capturing the different picture and the reference picture. 
 
     
     
       5. The method of  claim 1 , further comprising:
 accumulating the information indicating the camera movement between the reference picture and the different picture. 
 
     
     
       6. The method of  claim 1 , further comprising:
 determining a memory address for access by the motion estimator, based on the information. 
 
     
     
       7. A video encoder for encoding video data, said video encoder comprising:
 a memory operable to store a reference picture; and 
 a motion estimator operable to predict at least one portion of a different picture from the reference picture based on information indicating video camera movement between capturing the different picture and the reference picture, wherein the information indicating video camera movement comprises trajectory data of the video camera and is provided by a device that is operable to move the video camera with a predetermined direction. 
 
     
     
       8. The video encoder of  claim 7 , wherein the at least one portion of the different picture is comprised of a macroblock. 
     
     
       9. The video encoder of  claim 7 , wherein the at least one portion of the different picture is not the center of the reference picture. 
     
     
       10. The video encoder of  claim 7 , wherein the motion estimator is operable to access the memory based on the information indicating video camera movement between capturing the different picture and the reference picture. 
     
     
       11. The video encoder of  claim 7 , further comprising:
 an accumulator operable to accumulate the information indicating the camera movement between the reference picture and the different picture. 
 
     
     
       12. The video encoder of  claim 7 , further comprising:
 a controller operable to determine a memory address for access by the motion estimator, based on the information. 
 
     
     
       13. The video encoder of  claim 7 , wherein the video encoder further comprises:
 a motion compensator that forms a first prediction macroblock for a portion of the different picture and a motion vector identifying the prediction macroblock; 
 a subtractor that subtracts the prediction macroblock from the portion of the different picture to create a prediction error; 
 a transformation engine that block transforms the prediction error into a set of transform coefficients; 
 a quantizer that converts the set of transform coefficients into a set of quantitized transform coefficients; 
 a scanner that reorders the set of quantized transform coefficient; and 
 an entropy encoder that entropy encodes the set of quantitized transform coefficients. 
 
     
     
       14. The video encoder of  claim 7 , wherein the video encoder further comprises:
 a spatial predictor that forms a prediction macroblock for a portion of the different picture; 
 a subtractor that subtracts the prediction macroblock from the portion of the different picture to create a prediction error; 
 a transformation engine that block transforms the prediction error into a set of transform coefficients; 
 a quantizer that converts the set of transform coefficients into a set of quantitized transform coefficients; 
 a scanner that reorders the set of quantized transform coefficient; and 
 an entropy encoder that entropy encodes the set of quantitized transform coefficients. 
 
     
     
       15. An integrated circuit for encoding video data, said integrated circuit comprising:
 a memory operable to store a reference picture; and 
 a motion estimator circuit, electrically connected to the memory, operable to predict at least one portion of a different picture from the reference picture based on information indicating video camera movement between capturing the different picture and the reference picture, wherein the information indicating video camera movement comprises trajectory data of the video camera and is provided by a device that is operable to move the video camera with a predetermined direction. 
 
     
     
       16. The integrated circuit of  claim 15 , wherein the at least one portion of the different picture is comprised of a macroblock. 
     
     
       17. The integrated circuit of  claim 15 , wherein the at least one portion of the different picture is not the center of the reference picture. 
     
     
       18. The integrated circuit of  claim 15 , wherein the motion estimator circuit is operable to access the memory based on the information indicating video camera movement between capturing the different picture and the reference picture. 
     
     
       19. The integrated circuit of  claim 15 , further comprising:
 an accumulator circuit, electrically connected to the memory, operable to accumulate the information indicating the camera movement between the reference picture and the different picture. 
 
     
     
       20. The integrated circuit of  claim 15 , further comprising:
 a controller operable to determine a memory address for access by the motion estimator circuit, based on the information.

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